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Tetraethyl orthosilicate

for synthesis

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Synonym(s):
Tetraethyl orthosilicate, Tetraethoxysilane
Linear Formula:
(C2H5O)4Si
CAS Number:
Molecular Weight:
208.33
MDL number:
EC Index Number:
201-083-8

vapor pressure

2 hPa ( 20 °C)

Quality Level

Assay

≥99% (GC)

form

liquid

autoignition temp.

230 °C

potency

6270 mg/kg LD50, oral (Rat)
5860 mg/kg LD50, skin (Rabbit)

expl. lim.

1.3-23 % (v/v)

pH

7 (20 °C)

bp

168.0 °C/1013 hPa

mp

-85.5 °C

transition temp

flash point 45 °C

density

0.94 g/cm3 at 20 °C

storage temp.

2-30°C

InChI

1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3

InChI key

BOTDANWDWHJENH-UHFFFAOYSA-N

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This Item
86578333859131903
assay

≥99% (GC)

assay

≥99.0% (GC)

assay

99.999% trace metals basis

assay

98%

form

liquid

form

liquid

form

liquid

form

liquid

autoignition temp.

230 °C

autoignition temp.

-

autoignition temp.

-

autoignition temp.

-

expl. lim.

1.3-23 % (v/v)

expl. lim.

-

expl. lim.

-

expl. lim.

-

pH

7 (20 °C)

pH

-

pH

-

pH

-

General description

Tetraethylorthosilicate (TEOS) is the ethyl ester of ortho silicic acid, which is the most readily available silicon source. It is mainly used as a crosslinking agent in silicon polymer and precursor in the preparation of silicon thin films.

Features and Benefits

TEOScan polymerize in alkaline, acidic, and neutral conditions, making it anadvantageous precursor

Analysis Note

Assay (GC, area%): ≥ 99.0 % (a/a)
Density (d 20 °C/ 4 °C): 0.932 - 0.934
Identity (IR): passes test

Pictograms

FlameExclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Acute Tox. 4 Inhalation - Eye Irrit. 2 - Flam. Liq. 3 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

3 - Flammable liquids

WGK

WGK 1

Flash Point(F)

113.0 °F - closed cup

Flash Point(C)

45 °C - closed cup


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Customers Also Viewed

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Real-time study of CVD growth of silicon oxide on rutile TiO2 (110) using tetraethyl orthosilicate
Chaudhary S, et al.
The Journal of Physical Chemistry C, 119(33), 19149-19161 (2015)
Catalytic Cracking of n-Dodecane to Chemicals: Effect of Variable-Morphological ZSM-5 Zeolites Synthesized Using Various Silica Sources
Sanhoob MA, et al.
ACS Omega, 7(12), 10317-10329 (2022)
Effects of tetraethyl orthosilicate (TEOS) on the light and temperature stability of a pigment from Beta vulgaris and its potential food industry applications
Molina GA, et al.
Molecules (Basel), 19(11), 17985-18002 (2014)

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